Spencer's good deed was inspired by the upcoming Martin Luther King Jr. Day, and her late mother, Dellsena.

"Tomorrow I've bought the 8pm showing of #hiddenfigures the rave Baldwin hills," the Oscar winner wrote on Instagram, alongside a stunning watercolor of her Hidden Figures character by Los Angeles artist Stella Blu. "If you know a family in need that would like to see our movie but can't afford it have them come. It's first come first served. My mom would not have been able to afford to take me and my siblings. So, I'm honoring her and all single parents this #mlkweekend Pass the word."

Spencer and co-stars Taraji P. Henson and Janelle Monáe have reason to celebrate, as Hidden Figures soared to first place at the box office during its opening weekend. The film chronicles the untold story of three African-American female mathematicians who calculated flight trajectories that helped NASA achieve its first successful human space mission, and the Apollo 11 flight to the moon, in the 1960s.

ET’s Nancy’s O’Dell caught up with Spencer at the Golden Globes on Sunday, where she reacted to having the No. 1 movie in the country.

"It's exciting," she said. "It's a testament to what these men and women meant to the country. I’m so glad everyone is receiving their story."